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post #1 of 25 (permalink) Old 01-18-2014, 07:26 PM Thread Starter
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Mystery Problem, NEED HELP!

Went to start my 2006 Chevy Cobalt on morning and it cranks and cranks but won't turn over! The battery is fully charged, all the connections are tight and no corrosion, we bought a new starter, new coil pack, and new spark plugs and it still won't turn over. We ran a computer diagnostics and no codes came up. All the electronics still work, radio, lights, etc. Tested the ignition switch and it's fine as well. There is fuel pressure and nothing wrong with the fuel pump...At a dead end and have NO idea what is wrong with it. Please help!
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post #2 of 25 (permalink) Old 01-18-2014, 08:14 PM
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Did you check ignition 1 voltage fuse?

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post #3 of 25 (permalink) Old 01-19-2014, 05:03 AM
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Also, is your security warning light flashing?

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post #4 of 25 (permalink) Old 01-19-2014, 01:40 PM Thread Starter
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The fuse's are good and there is no security light flashing and already tried the 30 min 3 cycle security reset and that didn't help. Change the Crankshaft position sensor today and still won't turn over.
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post #5 of 25 (permalink) Old 01-19-2014, 03:12 PM
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When you checked the fuses, did you pull them out of their slots or just did a test light check?

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post #6 of 25 (permalink) Old 01-20-2014, 06:27 PM Thread Starter
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Pulled the fuses out and checked them and they are all good.
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post #7 of 25 (permalink) Old 01-20-2014, 06:48 PM
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Does it fire at all? Maybe you jumped timing... If you have fuel and spark it should start unless they're not there at the same time. Did you ever hear timing chain rattle or chatter before this happened?

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post #8 of 25 (permalink) Old 01-20-2014, 06:55 PM
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Are your injectors working properly? Did you verify that you are getting spark? Crank positioner sensor may be your problem, or cam sensor

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post #9 of 25 (permalink) Old 01-20-2014, 08:06 PM Thread Starter
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There were no sounds prior to this happening, just didn't start up one morning. It doesn't fire at all and the timing chain isn't broken. And we already replaced the crank position sensor and still nothing.
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post #10 of 25 (permalink) Old 01-20-2014, 08:59 PM
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How many miles?

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